Recommended draw weight: up to 20kg String dimensions are for [Ren-shin, Jiki-shin, Koku-shin] bows. The string material is ANGEL's Majesty 777. For the center serving, please wrap hemp or synthetic fiber over the base serving. Keep away from fire, sharp objects, and maten-nezumi (a type of rat). This product is a loop-type string. Adjust the height by twisting the string. Compared to other makers, this product is relatively low-priced because it is only pre-made and has not undergone maintenance. Basically, no returns or exchanges are accepted. Archery equipment Kyudo (Japanese archery) Anonymous delivery